The smartest way to find and save on all your textbooks! Purchase or rent the prior edition(pictured left) and save yourself the enormous and unnecessary expense! When compared with the later version ISBN: 0073405248 / 9780073405247 (pictured right), you will find very minor or no differences at all. We guarantee this book will work for your class or your money back. Please keep in mind that USED items may not always include the supplements such as discs or access codes. Returns always accepted within 30 days with no questions asked. We like to keep things simple. Please feel free to contact our friendly customer support for any assistance with your purchase or rental.